Abstract
The release of lipoteichoic acid (LTA) and teichoic acid (TA) from a Streptococcus pneumoniae type 3 strain during exposure to ceftriaxone, meropenem, rifampin, rifabutin, quinupristin-dalfopristin, and trovafloxacin in tryptic soy broth was monitored by a newly developed enzyme-linked immunosorbent assay. At a concentration of 10 microg/ml, a rapid and intense release of LTA and TA occurred during exposure to ceftriaxone (3,248+/-1,688 ng/ml at 3 h and 3,827+/-2,133 ng/ml at 12 h) and meropenem (2,464+/-1,081 ng/ml at 3 h and 2,900+/-1,364 ng/ml at 12 h). Three hours after exposure to rifampin, rifabutin, quinupristin-dalfopristin, and trovafloxacin, mean LTA and TA concentrations of less than 460 ng/ml were observed (for each group, P < 0.01 versus the concentrations after exposure to ceftriaxone). After 12 h of treatment, the LTA and TA concentrations were 463+/-126 ng/ml after exposure to rifampin, 669+/-303 ng/ml after exposure to rifabutin, and 1,236+/-772 ng/ml after exposure to quinupristin-dalfopristin (for each group, P < 0.05 versus the concentrations after exposure to ceftriaxone) and 1,745+/-1,185 ng/ml after exposure to trovafloxacin (P = 0.12 versus the concentration after exposure to ceftriaxone). At 10 microg/m...Continue Reading
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Citations
Aug 31, 2001·Clinical and Diagnostic Laboratory Immunology·L M PlitnickE J Gosselin
Mar 26, 2003·Antimicrobial Agents and Chemotherapy·Joachim GerberRoland Nau
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